Sailor Uniform and Tank

Shimada Kanon aims to be the strongest tank crew in the Kantou region. With her best friends Mariko Mutsumi, and their World War II-era, Panther V, they form the Nora Middle School Tank Crew. Unfortunately, as they have no sponsor to fund their effort, their dream is still just that. However, a chance to make a name for themselves arrives when delinquents come knocking on their school's door riding T-55s...

(Source Manga-Updates)